Synthesis and Antibacterial Activity of s-Triazoles, s-Triazolo[3,4-b]-1,3,4-thiadiazines and s-Triazolo[3,4-b]-1,3,4-thiadiazoles of 5-Methylisoxazole
作者:Xin-Ping Hui、Lin-Mei Zhang、Zi-Yi Zhang、Qin Wang、Fang Wang
DOI:10.1002/jccs.200000071
日期:2000.6
method of Reid and Heinde. 8 The cyclization of 4-amino5-mercapto-3-substituted 1,2,4-triazole with -halogeno carbonyl com pounds has been the most use ful method for the for ma tion of s-triazolo[3,4-b]-1,3,4-thiadiazine ring sys tem. How ever, this cyclization af forded dif fer ent prod ucts un der var i ous re ac tion con di tions. 9 As would be an tic i pated, treat ment of 2 with p-bromophenacyl
4-氨基-5-巯基-3-(5-甲基异恶唑-3-基)-1,2,4三唑2作为起始原料,采用Reid和Heinde的方法制备。8 4-氨基5-巯基-3-取代的1,2,4-三唑与-卤代羰基化合物的环化是生成s-三唑并[3,4-b]-的最有用的方法1,3,4-噻二嗪环系统。然而,这种环化在各种反应条件下产生了不同的产品。9 如前所述,在乙醇中用对溴苯甲酰溴或苯甲酰溴处理 2 会产生非环状 4-亚芳基氨基-5-巯基-3-(5甲基异恶唑-3-基)-1, 2,4-三唑。化合物3a-3b在用对溴苯甲酰溴或苯甲酰溴在回流的绝对乙醇中完全成功地处理2。化合物 3a-3b 的 IR 光谱由在 1589-1584 cm -1 处 C=N 的吸收带和在 1285-1278 cm -1 处 NN=C 的吸收带表征。1 H核磁共振